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Show LOCAL JNYENTOS PATENTS SIGNAL . WHISTLE SYSTEM Says It Hay Be Used on Trains, In Mines, Boiler Shops or Elsewhere. . It. B. Davis, a locomotive engineer employed by the Halt Lake route, and living at IS Wayne avenue, has received his patent for a si snail ng device which he perfected recently, and has completed arrangements for the manufacture of the device by a local concern which will begin be-gin to turn the article out for th trade as soon as special machinery for Its manufacture man-ufacture on a large csl can be assembled. assem-bled. The device I an electric air signal or steam algnal whistle, operated by electricity elec-tricity combined with (team or com-preeeed com-preeeed air. The whistle I aald to tuinil many functions that were beyond the reach of the ordinary whistle operated by cord, or elmllar device. The whistle, -for signaling In mine. I placed In the engine room, and I operated oper-ated from the dlgerer.t etatlons of the mine, by mean of electric current, controlled con-trolled by a switch. The switches are placed st each station In the mine from which sicnals are likely to be sent. When the switch I thrown, the current releases re-leases a trip In the whistle, causing the release of the steam or compressed air. thus blowing the whistle, which continues to Mow until the circuit Is thrown open again, st the switch. Send Many Moe-. i Signal long and short may be ent. being regulated by the. length of time the circuit Is allowed to remain closed. This Is said to be aa advantase over th bell slmsl system, aa the signals are more clearly defined, and there Is 1 chance for confusion. The operation of.the switch throw a Hsht circuit Into 'commission automatically automati-cally Ua-hllng Incandescent lamps st every slanaMng station In th mine, thue preventing pre-venting Interference, during signaling, from other stations. The system can be adapted, the Invert-tor Invert-tor savs, for use as a burglar alarm. Circuits Cir-cuits ar placed In uch manner that the openlns of any door or window so equipped will cms sn etectrlc circuit, thus sounding the whistle, which Is placed at the point most convenient to be heard by the watchman or patrol. , - . ( Oiv Alarm of Fir. The device, he says, may also be adapted for us a fire alarm elgnal system, sys-tem, by using fuse plug, of low best resistance. re-sistance. , . , Mr. Pnvls perfected his Invention In his efforts to solt the problem of eecurlng a better means of slgnsllrrg from all parts of a long train to the engineer's cab. The old hell cord signal system hss long been recognised e falling short of all the needs of com mu n leaf loo with the engineer, engi-neer, and lo overcome the objection to this system. Mr. Davis developed hi device. de-vice. Another us to which the device may be put I as an attachment for telephone In holler shop, machine shop, factories or other place where the great volume of noise prevents the hearing of telephone bell. Th device can be attached with but little trouble and St low coat to such telephone Instruments. andwll be Set In operation bv the ringing of the telephone call bell. When the circuit le cloeed In thl manner, th whistle will continue to blow until th receiver I lifted, which automatically opens the circuit, .and stops the whistle. . . ,t Th device I on exhibition st the storeroom of the Oallsher Machinery company, and ha attracted favorable notice no-tice from number of mining and mllllns men and railroader who have n It. Mr. Davis ha associated with him. In th manufacture of th device, W. S. Key-notds, Key-notds, fireman on the Salt Lake route. |